Beth Holloway has been living with a broken heart for 14 years. The disappearance of her 18-year-old daughter, Natalee, gripped headlines around the world. Whatever happened to Natalee, and to her remains, are unanswered questions. But for the first time since she went to look for her daughter, Beth has returned to the vacation island of Aruba with ABC's "20/20." Natalee was last seen on May 30, 2005, leaving a bar called Carlos'n Charlie's while on a high school trip.